l字母開頭
lack[læk] v. 缺乏(be short of)n. 缺乏(absence, shortage)，短缺
lack of ... ...的缺少
for lack of... 因缺乏...
e.g. he is lack of passion熱情 in work.
lag[læg] n./vi.(lagged, lagged, lagging) 落后(drop behind, get behind)
lag behind ... 落在...的后面
e.g. the children always lag behind when we go for a walk.
land [lænd] n. 陸地(earth)，土地(soil)， 國土v. (使)登陸，靠岸
land transportation 陸上運輸
forest land 林地
e.g. we are glad to be on land again.
laugh [lɑ:f] vi./n. 笑
laugh at... 嘲笑...
laugh... off 用笑擺脫...
laugh in sb.'s face 當面嘲笑某人
laughter ['lɑ:ftə] n. 笑, 笑聲
e.g. don't laugh at him. laughter is the best medicine.
launch[ lɑ:ntʃ] vt.發射(導彈、火箭等)(send off, set off)，發起(begin, initiate, set up, start ),使（船）下水 n. 發射，（船）下水
launch an artificial satellite ['sætəlait] 發射人造衛星
e.g.they have launched a man-made satellite successfully.
law [lɔ:] n. 法律，規律(rule, principle) ，定律
observe/keep/follow a law 守法
enforce a law 執法
the laws of nature 自然規律
e.g.i have to follow nature's law.
lay [lei]vt.(laid, laid, laying) 放置(put, place)，鋪設，布置，產(卵)
lay... aside 擱置..., 積蓄...
lay down... 制定...，放下...
lay out 布置, 展示
lay... off (臨時)解雇...
e.g. we shall have to dig挖under the river to lay the sewage 污水pipe.管道
lead [li:d] v.(led, led, leading) 領導(guide, direct, head, supervise)，為---帶路，通向，導致 n. 鉛， 領導 ，領先
lead sb. in doing... 領導某人做...
lead a ... life 過...生活
lead to... 導致..., 通向...
take the lead 帶頭
e.g. the guide向導led us to the river.
leader ['li:də] n. 領袖，領導者
e.g. he's a follower, not a leader.
leadership n. 領導能力
under the leadership of... 在...的領導之下
e.g. he shows quality才能 of leadership.
learn [lə:n]v. (learnt/learned, learnt/learned, learning)學習(study)，學會(acquire, grasp, master)，得知(know)， 記住(bear in mind, memorize)
learn ...by heart 記住...
learn from... 向...學習
learn of/about... 得知...， 了解...
e.g.one is never too old to learn. 活到老，學到老。